This is a note to let you know that I've just added the patch titled
net/mlx5: DR, Fix 'stack guard page was hit' error in dr_rule
to the 6.6-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-mlx5-dr-fix-stack-guard-page-was-hit-error-in-dr.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a523103a29d2b3ff526b133f7d4563e6e685bc7c
Author: Yevgeny Kliteynik <kliteyn@xxxxxxxxxx>
Date: Tue Jul 30 09:16:32 2024 +0300
net/mlx5: DR, Fix 'stack guard page was hit' error in dr_rule
[ Upstream commit 94a3ad6c081381fa9ee523781789802b4ed00faf ]
This patch reduces the size of hw_ste_arr_optimized array that is
allocated on stack from 640 bytes (5 match STEs + 5 action STES)
to 448 bytes (2 match STEs + 5 action STES).
This fixes the 'stack guard page was hit' issue, while still fitting
majority of the usecases (up to 2 match STEs).
Signed-off-by: Yevgeny Kliteynik <kliteyn@xxxxxxxxxx>
Reviewed-by: Alex Vesker <valex@xxxxxxxxxx>
Signed-off-by: Tariq Toukan <tariqt@xxxxxxxxxx>
Reviewed-by: Wojciech Drewek <wojciech.drewek@xxxxxxxxx>
Link: https://patch.msgid.link/20240730061638.1831002-4-tariqt@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_rule.c b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_rule.c
index 042ca03491243..d1db04baa1fa6 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_rule.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/steering/dr_rule.c
@@ -7,7 +7,7 @@
/* don't try to optimize STE allocation if the stack is too constaraining */
#define DR_RULE_MAX_STES_OPTIMIZED 0
#else
-#define DR_RULE_MAX_STES_OPTIMIZED 5
+#define DR_RULE_MAX_STES_OPTIMIZED 2
#endif
#define DR_RULE_MAX_STE_CHAIN_OPTIMIZED (DR_RULE_MAX_STES_OPTIMIZED + DR_ACTION_MAX_STES)
